The official decal is from Roaglaan from Flickr. I've printed it on sticker paper, and with fine liners improved it.
Don't worry if it isn't good the first time,
I have maked much different Ezio stickers.
Well i hope this helps a bit.

Quoting Cole Sackel
you may have made the decal, but it is the EXACT same as saber-scorpion's. on a better note, its way cooler than most of the assassins creed guys (NOT using saber-scorpion decals) i have seen on the web.
I will give it five stars once you make an Altair... and WITHOUT ANY inspiration from the scorpion.

Yes that is true, my decal is BASED from saber-scorpion's decal, but I made him truely by my self. i have already made an Altaïr. I will upload him soon.

you may have made the decal, but it is the EXACT same as saber-scorpion's. on a better note, its way cooler than most of the assassins creed guys (NOT using saber-scorpion decals) i have seen on the web.
I will give it five stars once you make an Altair... and WITHOUT ANY inspiration from the scorpion.